Selective apparatus.



G. H. G-ROCE.

SELECTIVE APPARATUS.

APPIJCATION FILED 1330.7,1903. 1, ()85,()36 Patented Ja11.20,1914

3 SHEETSSHEIIT 1.

WITNESSES: 4 j luvsnrron: i find G. H GROCE SELECTIVE APPARATUS.

APPLlOATION FILED DEC. 7,

Patented J 20, 1914-.

HUT In! lllliillll v OWN f w v INVENTOR. d%m

G. H. G-ROUE.

SBLEUTIVE APPARATUS. APPLICATION FILED DEC 7, 1908.

1,085,036. Patentedjan. 20, 1914.

3 SHEETS-$111131 3.

I g L WITNESSES: mvE-Nmm 7 Qufl/ J' --when the lugs gf gnd g touch them, an

with line 1- and Riis in series with line 52.

' e and c are also disengaged from the disks.

Attached to the armature of each step mag.

strikes the edge of the ratchet disk, and not the releasing, magnet B, to closea -circu1t matic view of an apparatus embodying this I invention, and showing the mode of connection of the despatchers oflice with a. series of stations on the line, employing neutral relays; Fig. 2 is a diagrammatic view of the selective apparatus at a station employing neutral relays; and Fig. 3 is a diagrammatic view of the apparatus at a station employing polarized relays.

At each station there isa selective apparatus S, Fig. 1, having two ratchet disks (1 and (1 Fig. 2, balanced or otherwise arranged to take a normal or .zero position automatically," and operated by step magnets 8 and 8, through the ratchet dogs a and 8. Each ratchet disk is provided with a retaining ratchet dog f and f normally acting to prevent backward movement of the disks. When the magnet B is energized, the retaining dogs are disengaged from. the ratchets and the disks are free to return automatically to their normal position. Attached to these retaining ratchet dogs are lugs f f,-th'at* so engage the ratchet dogs e and e? that the" latter are capable of independent action, but when the magnet 13 is energized the ratchet dogs net 8 or s is' a stop, consisting of an ad- JUSfilblQ screw 0 or 6' so arranged. that when the armature is attracted the screw only limits the movement-of the armature, but clamps the disk and holds itffrom r'cturning to the normal position so long as the step magnet is energized, and also prevents the disk fromv moving more than one step at a time. On each ratchet disk is a lug g or g. Attached'tothe base of the apparatus and insulated therefrom are contact springs h' and h, s0 arranged that electrical connection jlS made between the springs h and h through the frame of the machine. Two'circuit breakers j and j are so arranged that when the disks (1 and 11 are in the normal position the circuits through these circuit breakers will be bl'OliQIL-r The object-of these circuit breakerswill he cxplained -later. Circuit l'HTJCillC- ers k ,and 7:: are also iarranged to be operated by the'stepjmagnets s and 8 respectively.. l hese;: .-'circuit breakers are normally open and are closed only when the armatures ofithe "step magnets are attracted. There, ism. normally open circuit breaker 1, arranged .to lie-operated by the armature of when the arniature of the magnet is attracted.-

At each St{\l 10ll,-. lllnh'il'lLF? with the line wires,- are relay-s R's-nil l t is in series Condensers are placed across the terminals of the two relays so that the relays will not interfere with the talking circuit. At each of the stations are two keys K and K Then the keys at the despatchers ofiice are in their normal positions, they connect the linc wires 1 and 2 through the inductive resistance r, Fig. 1. The center point of each inductive resistance is connected by wire to ground. When either one of these keys K. or K is closed, the battery M is connected to the line wire controlled by that key, and the circuit is formed from the battery M through this linewire and through each of the corresponding line relays at the diil'erent stations, and returns to the bat tery M by way of the ground. So that, if key K is closed once, all the line relays R onthe' line 1 will be energized once and each one establishes a circuit at its local station through the battery L, which energizes the step magnet s and thereby advances the ratchet disk done step. If the sa ine key is closedagain, the same effects occur and the step disk is advanced another step. In the same way, when the key K is closcdfall of the line relays R on the line 2 at the different stations are energized, and each forms a local circuit which energizes the step magnet s and thereby advances the ratchet disk" d one step. In other words, each closing of a key advances its series of step magnets one step.

Supposing now that the call for the station shown in Fig. 2 is three stepson d and four steps on 03*. The method of operating is to close the key K twice. This steps the disk (1' up two steps. Then the-key K is closed three times, which steps the disk d up three steps. Now the two keys are closed simultaneously and are held. This steps up both ratchets one more step, which brings the 1u, 9 into contact with the contact spring h, and the lug 9 into contact with the contact spring 7L2. Now as long as the keys are held closed, a local circuit is formed at this particular station which, stariing froin the battery L, consists of the wire 21. the hell 7), wire 22, spring h, lug 5 the frame of the machine, lug (1", spring 7L wire 3. circuit closer (which is closed because the magnet s is energized), wire 4, circuit controller 71;, (which is also closed because step magnet s isenergized), wire 5, wire (3, back to battery. This energizes the hell 7' \\=liicli ie.maiiis energized as long as the circuit closers 7c and 70 are closed, or as long as the two keys K and Kare held closed. At the same time that this local circuit is formed, another circuit is cstablislu-d which starts from the battery L, through wire 7, magnet B, wire 8, wire 3, circuit controller'lc wire 4,'circu.it controller It, wire 5, back to battery. This energizestthe releasing magnet B and releases the ratchet dogs e, f, e and f s that the disks (5 and d are free to rctur to their zero or normal position; but the screws 0 and b on .the arinntures of the step magnets engage the edges of the disks, and the disks are held in their set positions. jlhe hell 1) therefore rings, as stated above, as long as a the magnets .9 and s are kept energized simultaneously. 'Still another circuit was formed when the magnet B was energized; This circuit starting from the battery L,

consists of the ivire 7, the magnet B, wire 8, circuit controller Z, (which is now closed),'wire 9, wire 10, circuit controller 7" '(which is now closed because the disk 03 is" away from its normal position), wire 11 and Wire 5 back to battery. This same circuit can also be completed by the way of wire 9, and 10, and circuit controller 7' and wire 12, 11 5 and 6 back to battery. The.

object of this latter double circuit'is to keep the magnet B energized and to hold the ratchet dogs out of engagementsiuntil both normal positions. l As soon as the keys K and K are released of the disks (1 and d have returned to their and have returned to their normal positions;

the i 'agnetss'. and 8?: are denia'gnetized and the disks (l and (l are free to return to their zgro positions. As soon as these diskssta-rt toward their zero positions, the contacts of the springs E and b are broken and the bellccasesto ring. When the disks have fully returned to their-normal positions, the circuit controllers j and 7' a e opened, thus i'leinagnet zing the magnet 15 and'allowing .the ratchet dogs to assume their normal'posilions. It will .be noted thatat any time i'i hen the two step magnets-grid machine are ii\-i-giz ,l simultaneously, the releasing mag: not is also energized; and consequently when both keys sire in the normal positionall of the selecting mechanisms return to their normail positions. This particular feature is important because, shouldanyfone of the "selcctii'c' devices of the system get outoI step, they can all be returned to their zero positions by closing the two call keys simiiltancously and thcn rclcasiiig them.

' e In order to provide means by which any station can call the despatching station, or

. by which an v .station cancall any other sta- .tiou, a calling battery N is provided, one

pole of which is connected tothe ground. 'lwoothcr keys K, K, are also provided at each slatioi'n'which operate circuit controllLlP Z. For example, when both keys K illl'f'l ii are in their normal position, the r'rir; unit of iliit wire l'froni the right is com-tee. crlthi-migh to line wire 1 of the line, and likewi e line ivire 2 is connected through from left to right. These circuit controllerswhen n their normal positions, also cut off to call another operator, located to the left of himsay, he first presses the key K. This cuts oft the line to the right and connects the battery to hiscalling'keys. He then operates the calling keys K and K in the same manner as described above, and thuscalls the station he desires, When he releases the key. K the line returns to its normal condition, that is, it is connected through his station. a If the operator wishes to call the station to the right-of him, he closcs-hisrkcy K,

which cuts off thelinc tofthe left andcon nects his calling keys to the; linesto the right. In some'sta tio-ns there might be inore than one telephone line,' and it-is obvious that this calling 'appaiatusl'ast described can be used for calling on any line by using the ordinary telephone jacks, so that the calling. apparatus may be plugged in to the line on which it is desired to-call.

Fig. 3 shows the equipment of a station despatchcrs station it necessary,-j can 'be identical; the only difference being-that at the end station, the power ends of'the lines l and 2 are connected. by an inductivere sistance. In this case, as in the other, the .polarized relay'R is in series w th linew i'e .1- and, when it is operated energizes the step ma et's andlikewise the olarized relay that is operated by the polarized system. In this, all stations on the line, including the.

R in series withthe line wire 2, when operated .by the current of the proper polarity,

energizes the step magnet 8?. The. selecting apparatus S is, identical with 'theforin'emp oying '-i'.eutral relays, except that twocircuit controllers have been added. One, n",

is arranged to be closed when the step magnet 8' is energizcd'and the other m is ar-- ranged tobe closed when the-ratchet disk d leaves'its zero position. The clarity of the lie line relaysv R and R, and t e connections to the keys K and K", are so 'arrangedth'at when the key K is closed, current sent through the lines 1' and 2.is of the proper polarity to operate the relay'R and when K is closed the polarity of the current sent tllIOlWll the lines is suitable tooperate the relay it; With this polarized 'system, the method of handling the .ciill'ing keys is slightly different from the method em loyed with neutral relays.- .Fs-ir exaniple, tie call; for the'station shown I. Fig. 3 is tlirec' steps on d and four steps on d. The operator who desires to call this station will first close his key K. The key K in its normal position. .simply connects the line wire 2 through the station at which this keyis located. 'lVhen this key is closed, it connects the line with the keys K and K but not insuch a way that, when the keys K and K are in 'their normal position, there. is'any battery supplied to the line. The operator, therefore, who desires to call, closes his key K and holds it closed. He. then closes the 'key K in this case twice. That energizes the line relays R so that they close the local circuit to the step magnets S and'stcp up the disk all two steps. The operator then closes the key K three times. This energizes the line relays R and through the local circuit the step magnet 8?,

. and steps up the disk (1 three steps. New

returning to the key'K he closes it once and holds it closed. This again energizes the relays R and also the step magnets s, and steps up the disk d one more stc making three in all. -Wheuthe magnet s is thus energized, another circ'nit is formed which, starting from the battery L, is composed of the wire 23, wire 24, circuit controller 72, which is now closed, wire 3, circuit controller m which is now closed because the disk (Z has been stepped up three steps, wire 4, wire 5, through the magnet s" and xvire 6 back to battery. This energizes the step magnet s and steps up the disk (I another step, makin four in all. Now, as long as the key K is held closed, both the step magnets 8'- and s? will be energized, and by the pressure of the adjusting screws 0' and 0 against the disks, the disks will be held in this particular position. And just as in the other system, this position of the disks brings the spring it into contact with the lug {1' and the lug 9 into contact with the spring 1:, andest-abhshcs the circuit for the bell I);

I and the energizing of both the step magnets s and .9 forms a circuit for energizing the releasing magnet l); and the ratchet dogs are held out of engagement. As soon as the magnet ll is energized, the circuit controller l is closed which closes another circuit go]: the magnet B, which latter circuit is controlled by circuit controllers j and j so that the magnet B will not be deiinergized until the ratchet disks have returned to their normal positions. The releasing of the key K dctincrgizes thelinc relays R and consequently the step magnets s and s and the bell stops ringing; and when the disks have returned to their normal positions. thecircuit through the releasing magnet B is broken, and ready for the 1ic\'t call. lVilh this system, in order to restore all the 1- lectors to zero without calling any station. it is necessary to have one of the thirty-six combinations devoted entirely to this purpose :-for example, one step on d and two steps on d. The closing of the key K once and then K once, and then K again, results in energizing the releasing magnets 13 without ringing any bell, and when the key K released tie apparatus returns to its normal position. It will be understood, of course, that while an operator is calling, he must hold his key K closed, and as soon as he has finished his call he releases the key K and thus connects the talking circuit through his station.

My invention is not limited to the embodiment thereof hereinhefore described and illustrated in the accompanyingdrawings, but may be embodied in various forms within the nature-of theinvention as it is defined in the succeeding claims.

What I claim is:

1. Theeombination of a plurality of selectors; selectively-operable devices for contr lling the movement of the selectors either independently or simultaneously froma distance; a translating device responsive to the conjoint action of all the selectors; and means including a device to be electrically energized for restoring the selectors to normal positioni 2. The combination ofa plurality of electric'selectors; selectively-operable devices for controlling the movement of the selectors either independently or simultaneously froma distance; a t'anslating device responsive to the conjoint action of all the selectors; and means including a .device to be electrically energized for restoring the selectors to normal position.

The combination of a plurality of electric selectors; a controlling circuit for each selector; an independently operable controller for each circuit; a translating device responsive to conjoint action'of all-the selectors; and means including a device to be electrically energized for restoring the selectors to normal position.

4. The combination of a plurality of se- .lectors, each having an electrical cont-act;

a circuit having therein all said contacts arranged in series; selectively-operable de- \iccs for controlling the movement 'of the selectors either i lcpendcntly orsimultaneously from a di .ncc; a translating device n said circuit; a source of energy in said circuit; and means including a device to be electrically energized for restoring the selectors to normal position. i

The combination of a plurality of solcclors, each having an electrical contact;-

scleclivoly'operahle devices for controlling" the nnwemcnt of the selectors either independently or simultaneously from a dislance; a. translating device responsive to the conjoint action of all the contacts; and

means including a device to be electrically energized; for restoring. the selectors to normal osition. 1 r '6, glhe combination of a plurality of elec- 5' tric selectors, each having an electrical contact; ,a controlling circuit for each-selector; an independentlyoperable controller for each circuit; acircuit opened and closed on conjoint action of all the contacts; a translifting device controlled by said circuit; and means including a device to'beclectrically 'energized'for resto 'ing the selectors to normal position. v I .7. Thecombination ofa lurality of selectors; selectively-operable evices for controlling the movement of the selectors either independently or simultaneously from a distance a translatingde'vice responsive to conioint'action of all'the selectors; means for olding'the selectors in the position they are placed by the .action of their controlling delv1 oes; and-means including a device to be electrically. energized for restoringv the selectfors to normalflposition.

The combination of a plurality of elecselectors; selectively-operable devices flncontrolling thembvementof the selectors eithcrindependentlyl or simultaneously from a, arm ating. device responsive so to con'oint'a'ction of all the selectors; means for ho dinthe selectors in the position they are placeidfiay the action of their controlling devices; and means includinga device to be "electrically; energized toi festoring the, selectoisjto norma n.

Thecombinatio f a'plurality ofelectric selectors; a contlo'llin circuit for each selector; an independent y 'operable controlley for each-circuit; a translati device 40 responsiveto 'c'onjointa'ction oj afi the selectors; -means for holding the selectors in the position they are placed by the action of their controllers; and means including a device to be electrically energized for re- 4'8' storing the selectors to normal position.

10. The combination. of aplurality of selector's, eachhaving an electrical contact;

a circuit having therein all said contacts a ged in series; selectively-operable de- 450 for controlling the mojfpment of the 'lecto'rs either independently'orcsimultane o'uslyfrom a distance; a translating device in" said circuit; a. source of encr in said "circuit; means for holding the se ectors in the osition they areplacedby the action Ziof t eir controllmg'devices; and means ineluding a device to be electrically energized forres'tio'rin'g the selectors to normal position.

ll. The combination of a plurality of se- Ie'c'tors, "each having an electrical contact; selectively-operable devices for controlling the movement of the selectors either inde- Pm n y r im an o sly m; a d

tance; a translating device responsive to holding the selectors in the position they are placed by the action of their controlling means; and means including a device to be electrically energized for restoring'theselectors to'normal position.

12. The combination of a plurality of'cleclric selectors, each having an electrical conan independently-operable controller for each circuit; a circuit closed on conjoint action of all the contacts; a translating device controlled by said circuit; means for holding. the selectors in-the position they are placed by the action of their controlling means; and means including a device to be .lectors to normal position.

13. In a selective telephone calling mechanism; the combination of a plurality of electric selectors, each havin a contact adapted to be made when the se ector is in a predetermined position; a plurality. of controlity of independently-operable controllers, one for each controlling circuit; a calling signal; means controlled by said contacts for operating the same on conjoint action of all the selectors; and means including a device to be electrically energized for restoring the selectors to normal position.

14.21;: a selective telephone calling mecha-, nism; the cofiibination of a plurality of elec tric selectors, each havin a contact adapted to be made when the se ector is in a predetermined position; a plurality of controlling circuits, one for each selector; a plurality of independcntly-operable controllers, one for each controllin circuit; a callin signal; a circuit control ing the signal and including all said contacts arranged in series; a. source of energy; and means including a device to be electrically energized for restoring the selectors to normal position. 15. In a selective telephone callingmechanism; the combination ofa plurality of electo be made when the se ector a predetermined position; a plurality 'ofcontrolling circuits, one for each. selectorya lurality of independently-operable control ers, one for each controlling circuit; a calling signal; means for. operating he -same on for holding the selectors in the )osition they are placed by the, action of thei controllers; and means including a de icoto be electrically energized for restormgzthe selectors to normal position. l,

to be, made vvhen the se conjoint action of all the contacts; means for electrically energized for restoring the seling circuits, one for each selector; a plural tric selectors, each havin a cong nadapted conjoint'action of all the sole tors; means 16. In a selectivetelephone calling main, nism; the combination of a plurality of 'electact; a controlling circuit for each selector;

trio selectors, each havingl a contactadapted determined position; a plurality of controlling circuits, one for each selector; a plurality of independently-operable controllers, one for each controlling circuit; a calling signal; a circuit including all said contacts arranged in series; a source. of energy; means for holding theselectors in the position they are placed by the action of their controllers; and means including a device to 10 be electrically energized for restoring the selectors to normal position.

17. The combination. of a plurality of movable electric contact makers; an electric driving mechanism for each contact maker; a separate controlling circuit for each driving mechanism; a controller for each con driving mechanism for each contact maker;

a separate controlling circuit for each driving mechanism; a controller for each controlling circuit; a translating device; a, circuit therefor comprising all said contacts in series; a'source of energy; a device'for disengaging all the driving mechanisms; and

p a circuit controlled-by a plurality of said contact makers for energizing said last mentioned device on, conjoint operation of a predetermined plurality of said controllers. 319. The combination of a plurality of v movable electric contact makers; an electric driving mechanism for each contact maker; a. separate controlling circuit for each driving mechanism; a-controller. for each controlling circuit; a translating device; a circuit therefor comprising all said contacts in 'series; a source of energy; a restoring device for disengaging all thedriving mechanisms;"a circuit controlled by a plurality of said contact makers for energizing saidrestoring device on conjoint operation of a predetermined plurality of said controllers; stops governed by the respective controlling circuits for holding each contact maker in set'position when its driving mechanism is disengaged; and means for releasing said stops to allow the contact makers'to assume;

'normahposition.

20; The'fcombination of a plurality of "movable electric contact makers; a pawl and ratchet mechanism for each contact maker;

van electromagnetic motor for actuating each pawl and ratchet mechanism; a separate controlling circuit for each motor; a. controller for each controlling circuit; a translating device; a circuit therefor comprising all said contact makers in series; a source of energy; and means for disconnecting said pawl and ratchet mechanismfrom the contact makers on simultaneous action of a predetermined plurality of saidcontrollers.

21. The combination of a plurality of movable electric contact makers; a pawl and ratchet mechanism for each contact maker; an electromagnetic motor for actuating each pawl and ratchet mechanism; a separate controlling circuit for each motor; a controller for each controlling circuit; a translating device; a circuit therefor comprising all said contact makers in series; a' source of energy; a restoring device; for disengaging all the pawl and ratchet mechanisms; and a circuit controlled by a plurality of said contact makers for energizing said restoring device on conjoint operation of a predetermigieilplurality of said electro-magnetic motors. ,v p a 22. The combination of a plurality of movable electric contact makers; a pawl and ratchet mechanism for each contact marker;

an electromagnetic motor for actuating each pawl and ratchet mechanism; a separate controlling circuit for each motor; a controller for each controlling circuit; a translating device; a circuit therefor comprising all 'said contact makers in series; asource of energy; a restoring'device for disengaging all the pawl and ratchet mechanisms; a circuit controlled by a plurality of said contact makers for energizing said restoring device on conjoint operation of a predetermined plurality of said electro-magnetic motors; stops govcured by the respective controlling circuits for holding each contact maker in set'position when its pawl and'ratchet mechanism isdisengaged; and means for releasingsaid stops to allow the contact makers to assume normal position. 1. i

23. A selective system comprising-a plurality'of stations; each station being provided with selective apparatus having, 'in' combination, a plurality of electrically-actuated selectors having a, step-by-step operation in response to successive electricaliimpulses and an electric translating'deviceop erated by the selectors jointly andonly upon the attainment by each selector a predetermined position; means for transmitting to all said stations a series ofelectrical impulses to operate similarly the selectors in all of the stations, the translatingQgleVicesat the several stations being arranged'and connected to respond to different predetermined positions of their respective selectors so that said source to move said members independently step by step to certain predetermined "their moved. positions as they are advanced step by step, and-means governed by the first named means to release said members from the second named'means.

25. Ina selector. instrument, aplurality of. movable members, a source of current, means operated by separate current. impulses to move said members independently step by step to certain predetermined positions, means to hold the members in their moved positions'as they are advanced step by step,

" and means governed by the first named means to release saidmembers from the sec ondnamed means, and means to retain said last named means operative until the full return of each movable member to normal position.- 1

26.- In a selector instrument, a plurality of movable members, means to move said members independently step by step, means for holding the members in moved position,'an

' open circuit including an electrical device .and a source of energy, means associated 25'.

with each movable member adapted to 00-- operate forclosing said open circuit, said means, placed in operative position by a, pre- 1 determined step by'step movement of each movable member and means for restoring said members to initial position.

27. In a selector instrument a plurality of movable members, separate means for imparting a step by step movement to each' member, said movablemembers having 'a normal position and a plurality of operated positions, means to hold said movable niembers in operated position and means governed by the simultaneous action of said sep aratemeans' to release said movable mem-. bers from any operated position thus allowing them to return to normal position.

' 28. In a selector, a source of'current, an indicator in a-normally open circuit with 'said source of current, two pivoted mem bers, means forrotating the pivoted members through any desired angle, means oper ated by a predetermined rotation of both the pivoted members for closing said normally open circuit, means for holding said pivoted members in moved positiom gpd means for releasing said holding means,

29. In a selector, a sourob 'of current, an indicator in a normally open circuit with said source of current, two pivoted members, means for rotating the pivoted members through any desired angle, means operated by a predetermined rotation of both the pivoted members for closing said normally open circuit, means for holding said pivoted members in moved position, and means includin a device to be electrically energized for re easing said holding means; i

'30. In a selector, an electro-magnet, means to energize the electro-magnet, an armature positions, means to 'hold the members in l governed by the electro-magnet, a' pivoted mendmr, means governcd'by the arn'iature desired angle, another elcctro-magnct, means to energize the other clectro-magnet, an armature governed by the other, electrd-mag not, another pivoted member. means gov;- erncd by the armature oi the second said elcctro-magnet for rotatipg'thc othersaid pivoted 'mcml'icr through any desired angle, a source of current,a signal, a normally open circuit including said source of current and sai'dsig'nal, means governed by each pivoted member for partially closing said open circuit, means for holding said pivoted members in moved position, and means for restoring said pivoted members to initial position.

3 1. In a selector, an electro-magnet, means to energize the electro-magnet, an arn'iature governed by the electromagnet, a pivoted member, means governed by the armature for rotating the pivoted member, another clectro-magnet, means to energize the other electro-magnet, an armature governed by -the other said pivoted member, a source of current,'a signal, a normally open circuit including said source of current and said signal, means governed by one of said pivoted members for partially closing said normally open circuit, means governed by the other ot said pivoted members for then completely closing said normally open circuit, means for holding said-pivoted members in rotated position, and means'for restoring said pivoted members to initial position.

32. In a selective. device, a source of current, an indicator included in a normally open circuit with said source of current, two independently pivoted members. means for independently rotating lhemembers, means for closing said normally open circuit by a selective movement of each of said members,

, means for holding said pivoted members in .moved pos1t1on,and means for restoring said pivoted members to initial position.

33. In a selective device, a source of current, an indicator, said indicator included in a normally open circuit with said source of current, two normally open contacts in said normally open circuit. a pivoted sector, means operated by a predetermined movement of said sector for closing one of said normally open contacts, another pivoted sector, means operated closing ihe'othcr of said normally open contacts, means for operating both of saidsectors, and holding them in opera-ted eition, and means for restoring the sectors to .iltlill position.

by a predetermined -movcment of the other of said sectors for 34. Ina selective device, a source of our- I tacts, two other normally open contacts in rent, an indicator, said indicatorincluded in a normally open circuit withsaid source of current, two normally open contacts in said normally open circuit a pivoted sector, means operated by a predetermined movement of said-sector for closing one of said normally open contacts, another pivoted sector, means operated-by a predetermined movement of the other of said sectors for closing the other of said normally open consaid normally open circuit, means for rotating each of said sectors, and means operated simultaneously with the operation of the 15 sectors for closing the two other normally open contacts.

GEORGE H.- GROCE. Witnesses: I

E. PAnsoNs, E. B. REYNOLDS. 

